Tutorial M04
Introduction
In this module, bridges are represented within the 2D domain. Topographic changes are made to cut through the road and a time series data output created to gain information on a range of hydraulic parameters of the bridge.
The GIS layers are:
- TGC layers:
- 2d_lfcsh: A layer used for modelling 2D flow under and over bridges, pipes and other obstructions across the waterway.
- 2d_zsh: A layer used to modify Zpt elevations using points, lines and polygons.
- TCF layers:
- 2d_po: A time series data output from 2D domains, for a range of hydraulic parameters.
Module 4 builds from the model created in Module 2. The completed Module 2 model is provided in the Module_04\TUFLOW folder.
GIS Inputs
Create, import and view input data:
Simulation Control Files
TUFLOW Geometry Control File (TGC)
- Save a copy of M02_001.tgc as M04_001.tgc in the Module_04\TUFLOW\model folder.
- Open the M04_001.tgc in a text editor and add the additional lines below the 'Read GIS Z Shape' command:
QGIS - SHP
Read GIS Z Shape == gis\2d_zsh_M02_cut_002_R.shp ! GIS layer used to define excavation through embankment
Read GIS Layered FC Shape == gis\2d_lfcsh_M04_bridge_001_L.shp ! Layered flow constriction representing 2D bridge losses
QGIS - GPKG
Read GIS Z Shape == 2d_zsh_M02_cut_002_R ! GIS layer used to define excavation through embankment
Read GIS Layered FC Shape == 2d_lfcsh_M04_bridge_001_L ! Layered flow constriction representing 2D bridge losses
- Save the TGC.
The 2d_zsh_M02_cut_002_R file from Module 2 is first read to cut through the embankment. The 2d_lfcsh is then read to represent the structure. The order is important as the 2d_lfcsh has an invert value of 99999, it uses the underlying elevation values to represent the invert of the 2D bridge. If this was read before the 2d_zsh file, it would use the elevation of the embankment crest.
TUFLOW Control File (TCF)
- Save a copy of M02_5m_001.tcf as M04_5m_001.tcf in the Module_04\TUFLOW\runs folder.
- Open the M04_5m_001.tcf in a text editor and make the following reference updates:
QGIS - SHP
Geometry Control File == ..\model\M04_001.tgc ! Reference the TUFLOW Geometry Control File
QGIS - GPKG
Spatial Database == ..\model\gis\M04_001.gpkg ! Specify the location of the GeoPackage Spatial Database
Geometry Control File == ..\model\M04_001.tgc ! Reference the TUFLOW Geometry Control File
- Update both the 2d_po line and point files:
QGIS - SHP
Read GIS PO == ..\model\gis\2d_po_M04_001_L.shp ! Reads in plot output line
Read GIS PO == ..\model\gis\2d_po_M04_001_P.shp ! Reads in plot output point
QGIS - GPKG
Read GIS PO == 2d_po_M04_001_L ! Reads in plot output line
Read GIS PO == 2d_po_M04_001_P ! Reads in plot output point
- Save the TCF.
Running the Simulation
- Save a copy of _run_M02_HPC.bat as _run_M04_HPC.bat in the Module_04\TUFLOW\runs folder.
- Update the batch file to reference the M04_5m_001.tcf :
set exe="..\..\..\exe\2023-03-AF\TUFLOW_iSP_w64.exe"
set run=start "TUFLOW" /wait %exe% -b
%run% M04_5m_001.tcf
- Save the batch file and double click it in file explorer to run the simulation.
Troubleshooting
See tips on common mistakes and troubleshooting steps if the model doesn't run:
Check Files
While the model is running, review the added features are specified correctly:
Results
When the model is finished, review the results:
Conclusion
- A 2d_lfcsh was supplied and used to represent a bridge structure in the 2D domain. The invert level of this structure was implied from the underlying topography created by cutting through the road embankment.
- 2d_po structure group was setup and described to enable more detailed result viewing through the structure.
- Check files were used to review the 2D bridge application.
- Results were visualised to show water passing through the 2D bridge and the structure group results were assessed.
- A 2d_lfcsh was supplied and used to represent a bridge structure in the 2D domain. The invert level of this structure was implied from the underlying topography created by cutting through the road embankment.
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